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Farmall & IHC Tractors Discussion Forum
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shered pin in pto

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david akins

03-15-2006 05:14:08




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i have a super C farmall was mowing with 5' drag type brush hog.It has small side pto and main pto shaft comes out at back.It made no noise it just quit turning,small shaft seems to turn alright is there a shere pen or key that might have shered ,and what does it require to fix it thanks david




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Haas

03-15-2006 19:06:26




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 Re: shered pin in pto in reply to david akins, 03-15-2006 05:14:08  
Yes, there is a woodruff key that keys the gear to the PTO shaft. You have to pull the unit off to get to it. Could also be other things too, but since the small belt pulley shaft is still turning, likely its the woodruff key. You have to use a puller to get the gear off the shaft. Don't try to drive the shaft out, as the woodruff key will hit the bearing and prevent that. Of course it the key is sheared, you might be able to drive the shaft out, but I would not try that as there may be enough left that the key would not go through the bearing race.

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scotty

03-15-2006 06:38:17




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 Re: shered pin in pto in reply to david akins, 03-15-2006 05:14:08  
Mornin David, Yes, there is a key that may have sheared. You need to pull the PTO unit off. I believe I needed a gear puller to get that gear off. Yes, it is a pain to get it apart. If memory serves me right, I think it was a woodruff key.

scotty



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Nat 2

03-15-2006 06:17:09




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 Re: shered pin in pto in reply to david akins, 03-15-2006 05:14:08  
There's no pin to shear in there...

I think all there is, is a sliding collar that joins the transmission shaft to the PTO output shaft. The collar may be stripped out, the teeth on the shaft(s) may be worn off, or the linkage that slides the collar is worn out.

You'll have to pull it apart, figure out what's wrong, and fix it, because there's really no one thing that breaks or goes wrong with these. They're simple, robust designs, meant to last a long time.

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